206451535164 has 72 divisors (see below), whose sum is σ = 562281442128. Its totient is φ = 58784785920.

The previous prime is 206451535163. The next prime is 206451535237. The reversal of 206451535164 is 461535154602.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206451535163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 426877 + ... + 771444.

It is an arithmetic number, because the mean of its divisors is an integer number (7809464474).

Almost surely, 2^206451535164 is an apocalyptic number.

It is an amenable number.

206451535164 is an abundant number, since it is smaller than the sum of its proper divisors (355829906964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206451535164 is a wasteful number, since it uses less digits than its factorization.

206451535164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198635 (or 1198626 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

Adding to 206451535164 its reverse (461535154602), we get a palindrome (667986689766).

The spelling of 206451535164 in words is "two hundred six billion, four hundred fifty-one million, five hundred thirty-five thousand, one hundred sixty-four".